Question

1, Explain the concept behind valence bond theory. 2, Again, consider the CHCl3 atom. A, How...

1, Explain the concept behind valence bond theory.

2, Again, consider the CHCl3 atom.

A, How many lone pairs does the carbon have?

B, What is the hybridization of the C atom in CHCl3?

C, How many σ-bonds are there? How many π-bonds are there?

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Answer #1

Ans 1 :

The valence bond theory explains the bonding of atoms in a molecule.

According to this theory , the covalent bond is formed between the atoms by the overlapping of valence orbitals of the atoms , which are half filled.

Due to the overlap of these orbitals , the probability of finding the electrons in this region is maximum.

When there is a head-on overlapping of orbitals , the sigma bond is formed , but when the overlapping occurs sideways , a pi bond is formed.

So a sigma bond is much more stronger than the pi bond , due to its higher extent of overlapping.

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